Abstract
Trout liver mitochondria were incubated in the presence of micromolar concentration of potassium dichromate (Cr(VI)) under several experimental conditions. Cr(VI) strongly inhibited both state 3 and state 4 of respiration supplemented by NAD-linked substrates; it also slightly affected the respiration of FAD-linked substrates. Evidence is provided that the respiratory inhibition induced by dichromate is partially coupled to the Cr(VI) reduction mechanism occurring in mitochondria.
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